Cisco developed Enhanced IGRP to overcome some of the limitations of its proprietary Distance Vector routing protocol, Interior Gateway Routing Protocol (IGRP). IGRP offered improvements over Routing Information Protocol (RIP), such as support for an increased number of hops; however, IGRP still succumbed to the traditional Distance Vector routing protocol limitations, which included the following:
- Sending full periodic routing updates
- A hop limitation
- The lack of VLSM support
- Slow convergence
- The lack of loop prevention mechanisms
Unlike the traditional Distance Vector routing protocols which will send their neighbors . . .
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